Apparatus

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sensors Mode-S transponder

3E7CDD

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-KMMF · STEMME S-6

Hex
3E7CDD
Octal
17476335
Decimal
4,095,197
Country
DE
Tail
D-KMMF
Type
S6
Broadcasting now · callsign DKMMF · 3,900 ft
Flights observed
5
Distinct callsigns
1
Country
DE
Last broadcast
1h ago

Current position

3E7CDD is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3E7CDD falls within the block assigned to Germany (DE) by ICAO Annex 10, Volume III. Every aircraft registered in Germany receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
DKMMF - 5 2026-06-13

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-06-13 DKMMF - Jun 13, 11:05 UTCJun 13, 11:15 UTC10m
2026-06-01 DKMMF - Jun 1, 13:55 UTCJun 1, 14:05 UTC10m
2026-04-23 DKMMF - Apr 23, 15:15 UTCApr 23, 16:10 UTC55m
2026-04-16 DKMMF - Apr 16, 15:15 UTCApr 16, 15:40 UTC25m
2026-04-16 DKMMF - Apr 16, 14:40 UTCApr 16, 15:00 UTC20m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the D-KMMF page for operator, model, and routing details .

Mode-S 3E7CDD frequently asked

What is Mode-S code 3E7CDD?
3E7CDD is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-KMMF.
Where is Mode-S 3E7CDD registered?
Mode-S code 3E7CDD is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3E7CDD broadcasting right now?
Yes. Mode-S 3E7CDD is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3E7CDD, octal 17476335, decimal 4,095,197.
What flights does 3E7CDD operate?
Mode-S 3E7CDD has broadcast 1 distinct callsign, including DKMMF.